How to get "m" meters and "km" from string using regex?

user_4827688 0
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I was trying to get integer from below string and convert it again replace it . Need regex pattern to get mtr, km array from string. Little help will be highly appreciated.

let stringText = "Please continue for 290 m. And then take left and continue for 1.2 km.";
console.log(stringText);
let mtr_pattern = "";
let kn_pattern = "";
let numArr = stringText.match(/\d+\.\d+|\d+\b|\d+(?=\w)/g) || []);
numArr = numArr.filter(n => n != '.');
console.log("numArry", numArr);

output should be : Please continue for 0.18 miles. And then take left and continue for 0.74 miles

javascript regex
1 Answers

You could take the numerical value and the unit. Then convert the value to miles.

let
    km2miles = km => km * 0.621371,
    string = "Please continue for 290 m. And then take left and continue for 1.2 km.",
    result = string.replace(
        /(\d+\.?\d*) (k?m)/g,
        (_, a, b) => km2miles(b === 'km' ? a : a / 1000).toFixed(2) + ' miles'
    );

console.log(string);
console.log(result);

user_14476750
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